package com.projeto.sistema.vendas.Util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.log4j.Logger;
import org.hibernate.SessionFactory;

import com.projeto.sistema.vendas.HibernateUtil;

public class ConexaoHibernateFilter implements Filter {

	private SessionFactory	sessionFactory;

	private Logger			logger	= Logger.getLogger(ConexaoHibernateFilter.class);

	public ConexaoHibernateFilter() {
	}

	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest servletFilter, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {

		try {
			this.sessionFactory.getCurrentSession().beginTransaction();
			chain.doFilter(servletFilter, servletResponse);
			this.sessionFactory.getCurrentSession().getTransaction().commit();
			this.sessionFactory.getCurrentSession().close();
		} catch (Throwable ex) {
			try {
				if (sessionFactory.getCurrentSession().getTransaction().isActive()) {
					this.sessionFactory.getCurrentSession().getTransaction().rollback();
				}
			} catch (Throwable e) {
				logger.error(e.getMessage());
			}
			throw new ServletException();
		}
	}

	@Override
	public void init(FilterConfig conf) throws ServletException {
		this.sessionFactory = HibernateUtil.getSession();

	}

}
